Essential information for anyone wanting to protect Internet-connected computers from unauthorized access. Includes:

thorough discussion of security-related aspects of TCP/IP;
step-by-step plans for setting up firewalls;
hacking and monitoring tools the authors have built to rigorously test and maintain firewalls;
pointers to public domain security tools on the net;
first-hand step-by-step accounts of battles with the “Berferd” hackers; and
practical discussions of the legal aspects of security.

New link

http://rapidshare.com/files/5347306/firewalls_and_internet_security_second_edition.rar